Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
LoopMessage - LoopMessage is a perfect macOS tool for personalized mass messaging via iMessage/SMS, WhatsApp, Facebook Messenger, Telegram, Viber, and Skype.
Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.
SuperDMs - SuperDMs helps you grow your following by sending bulk DMs to your tweet responders.
OneNote - Get the OneNote app for free on your tablet, phone, and computer, so you can capture your ideas and to-do lists in one place wherever you are. Or try OneNote with Office for free.
WhatsMany - Send personalised WhatsApp messages in bulk